I personally never had any problems with Firefox Its a great browser I dont like Opera for a variety of reasons.
Sounds like you have spyware. DOn't blame FF, it's not its fault. FF > IE Opera > IE FF = Opera I use Firefox because I like the skins. But Opera is a very good browser, too.
Opera looks good just dl some skins for it, i use a nice black one and it looks better then any firefox skin; simple, sleak. customize your toolbar to and remove all the useless ---- you dont need except tabbed windows and the bar with back and stop on it. the skins balled black aqua too for all wondering.
well actually, firefox is not liking my forums. when you register and see that security number, sometimes some of them will not show. this is a firefox problem. It has been tested on IE and Opera and works fine...